php导出数据到excel出现乱码的解决办法

<?php
/**
 * 导出数据到excel 解决乱码问题
 * Edit www.jb200.com
*/
function xlsBOF() {
  echo pack("ssssss", 0x809, 0x8, 0x0, 0x10, 0x0, 0x0);
  return;
}

function xlsEOF() {
  echo pack("ss", 0x0A, 0x00);
  return;
}

function xlsWriteNumber($Row, $Col, $Value) {
  echo pack("sssss", 0x203, 14, $Row, $Col, 0x0);
  echo pack("d", $Value);
  return;
}

function xlsWriteLabel($Row, $Col, $Value ) {
  $Value = iconv("UTF-8", "gb2312", $Value); //加上本语句，解决导出excel文件乱码问题20110629
  $L = strlen($Value);
  echo pack("ssssss", 0x204, 8 + $L, $Row, $Col, 0x0, $L);
  echo $Value;
  return;
}

include "connection.php";
$sql = "select ledger_name,ledger_sex ,ledger_age ,ledger_addfrom ps_ledger_11";
$query = mysql_query($sql);

// 文件头
header("Pragma: public");
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Content-Type: application/force-download");
header("Content-Type: application/octet-stream");
header("Content-Type: application/download");
header("Content-Type: application/vnd.ms-excel; charset=UTF-8");
header("Content-Disposition: attachment;filename=警务室辅助警力统计表.xls ");
//header("Content-Disposition: inline;filename="" . $filename . ".xls"");
//iconv("utf-8", "gb2312", $filename);//解决文件引起的乱码".xls"");
header("Content-Transfer-Encoding: binary ");

// 向表中添加数据
xlsBOF();
xlsWriteLabel(1,0,"列名");
xlsWriteLabel(1,1,"列名");
xlsWriteLabel(1,2,"列名");
xlsWriteLabel(1,3,"列名");
xlsWriteLabel(1,4,"列名");
$xlsRow = 1;
while($array = mysql_fetch_array($query)) {
++$i;
xlsWriteNumber($xlsRow,0,"$i");
xlsWriteNumber($xlsRow,0,"$array[0]");
xlsWriteLabel($xlsRow,1,"$array[1]");
xlsWriteLabel($xlsRow,2,"$array[2]");
xlsWriteLabel($xlsRow,3,"$array[3]");
xlsWriteLabel($xlsRow,4,"$array[4]");
$xlsRow++;
}
xlsEOF();
exit();
//测试能用，列名显示不出来，有待解决
?>